ok ok something about how eddie was so upset about theo losing both his parents, thinking about chris and shannon and "at least he had me" and then the very next episode eddie gets shot? seems VERY ideal for a will mention, yes? picturing him telling buck "i don't know what's going to happen to me but you have to get out alive because chris can't lose you too" and lots of implying that buck is chris's other parent?!?
maybe this happens after buck tries to get custody of theo but he doesn't actually have any parental rights and it turns out that there is actually family that can take him in, and buck is sad but then the shooting thing happens and this is how he finally realizes that he already has a family and a kid and that's how buddie canon can still win.